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Finding the Fourth Proportional to 351,662.02, 527,485.59 and 85,423.78

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Solution

The fourth proportional to 351,662.02, 527,485.59 and 85,423.78 is: 128,133.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,662.02 : 527,485.59 = 85,423.78 : x
  2. Step 2: Convert to fraction form
    351,662.02/527,485.59 = 85,423.78/x
  3. Step 3: Cross multiply
    351,662.02x = 527,485.59 × 85,423.78
  4. Step 4: Simplify right side
    351,662.02x = 45,059,812,993.33
  5. Step 5: Solve for x
    x = 45,059,812,993.33/351,662.02
  6. Step 6: Final answer
    x = 128,133.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.